The expansion was announced on August 6 at Gamescom 2015. Following the announcement, several developer interviews were published that revealed more information and made clarifications.

Alpha testing began on November 23, 2015. Alpha servers were taken offline on December 21 for the holidays, and were brought back up on January 13, 2016. On April 18, it was announced that Legion's release date will be August 30, 2016. Furthermore, it was announced on May 10 that Legion's beta test would begin on May 12, 2016.

Contents

The tomb of Sargeras has been reopened, and the demons of the Burning Legion pour into Azeroth. Their full, terrifying might is fixed on summoning the Dark Titan to Azeroth-and they've already located the key to his return.

With the Alliance and Horde devastated, adventurers must take up legendary artifacts and weapons used by the heroes of old, scour the ancient Broken Isles for the Pillars of Creation, relics of the Titans, and challenge the Burning Legion before Azeroth's last hope dies.

In Return to Karazhan, the Burning Legion has invaded Karazhan and attempts to open another gateway to the Twisting Nether. Khadgar works to stop them. Meanwhile in Suramar, a campaign to take Suramar City and defeat Gul'dan within the Nighthold starts. Odyn recruits champions to finally defeat Helya once and for all.

Return to Karazhan split into Upper Karazhan and Lower Karazhan, now available on Heroic and Mythic+ difficulties

Court of Stars and The Arcway now available on Heroic difficulty

New zone: Broken Shore

New reputation faction: Armies of Legionfall

New world quests, including class world quests

Legion assaults across the Broken Isles

Flying in the Broken Isles

New class-specific flying mounts

Continuation of class order campaign

New artifact traits and appearances

Difficulty of Heroic, Mythic, and Mythic+ dungeons increased

PvP Brawls

In The Tomb of Sargeras, the forces of Azeroth, united as the Armies of Legionfall, return to the Broken Shore to put an end to the Burning Legion invasion. After fighting across the island, the forces of Azeroth must delve into the Tomb of Sargeras and fight the forces of Queen Azshara and the Burning Legion, in order to defeat Kil'jaeden and seal the Legion's gateway. The Burning Legion retaliates by assaulting various areas across the Broken Isles.